CN214338264U

CN214338264U - Active power filter device for photovoltaic power distribution network

Info

Publication number: CN214338264U
Application number: CN202023163822.1U
Authority: CN
Inventors: 周文; 李铁成; 杨少波; 王磊; 孟良; 胡雪凯; 闫鹏; 梁纪峰
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-10-01
Anticipated expiration: 2030-12-24

Abstract

The utility model provides an active power filter for photovoltaic distribution network belongs to the electric power technology field, which comprises a housin, the casing has relative front panel and rear panel, be equipped with well plywood in the casing in order to incite somebody to action the casing is from last to dividing into working layer and heat dissipation layer down, the heat dissipation layer is equipped with radiator unit, follow in the working layer the front panel extremely the rear panel is equipped with in proper order and locates electric capacity board, IGBT board and relay board on the well plywood, the relay board top is equipped with the upper plate, be equipped with the neighbouring on the upper plate the keysets, the neighbouring of front panel the power of rear panel and with the operation board that the power is side by side. The technical effects are as follows: so set up for structure is compacter between each component, and the electric connection relation between each component is closer in the space, has reduced numerous and diverse circuit arrangement and sheet metal component's quantity, and the overall structure volume has been reduced to the overall arrangement rationalization more in the space, more is favorable to realizing the design of target electric bridge and arranges.

Description

Active power filter device for photovoltaic power distribution network

Technical Field

The utility model belongs to the technical field of electric power, more specifically say, relate to a photovoltaic is active filter device for distribution network.

Background

The active filter device is a novel special power harmonic treatment device which is manufactured by adopting a modern power electronic technology and a digital signal processing technology based on a high-speed DSP device, realizes dynamic tracking compensation, can compensate harmonic waves and reactive power, and has wide application in a plurality of industries. Generally, the active filter device is assembled into a complete set of modules by sheet metal parts, circuit boards and the like, and when the active filter device is applied to a photovoltaic power distribution network, the reliable operation of the photovoltaic power distribution network can be ensured, and the electric energy quality of a user is improved. The circuit boards with different functions in the traditional complete module are correspondingly connected, the number of components is large and complex, and the overall structure volume is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an active filter device for photovoltaic distribution network aims at solving the great technical problem of traditional active filter device overall structure volume for photovoltaic distribution network.

In order to achieve the above object, the utility model adopts the following technical scheme: the active filtering device for the photovoltaic power distribution network comprises a shell, wherein the shell is provided with a front panel and a rear panel which are opposite, a middle-layer plate is arranged in the shell to divide the shell into a working layer and a heat dissipation layer from top to bottom, the heat dissipation layer is provided with a heat dissipation assembly, a capacitor plate, an IGBT (insulated gate bipolar translator) plate and a relay plate which are arranged on the middle-layer plate are sequentially arranged in the working layer from the front panel to the rear panel, an upper-layer plate is arranged above the relay plate, and a switching plate adjacent to the front panel, a power supply adjacent to the rear panel and an operation plate which is parallel to the power supply are arranged on the upper-layer plate;

the power supply is electrically connected with the adapter plate, the adapter plate is electrically connected with the relay plate and the operation plate, the relay plate is electrically connected with the IGBT plate, the IGBT plate is electrically connected with the capacitor plate, and the capacitor plate is electrically connected with the heat dissipation assembly.

Furthermore, a safety plate arranged between the relay board and the rear panel is further arranged in the working layer, and the rear panel is provided with a terminal strip electrically connected with the safety plate.

Furthermore, a port plate which is parallel to the safety plate is arranged in the working layer, and the port plate is electrically connected with the adapter plate.

Further, the rear panel is provided with an N-phase terminal electrically connected to the IGBT board.

Furthermore, the IGBT boards are provided with a plurality of N-phase terminals, the N-phase terminals are electrically connected with a total N row, the total N row is electrically connected with a plurality of single-phase N rows, and the single-phase N rows are correspondingly electrically connected with the IGBT boards.

Further, the heat dissipation assembly comprises a fan and a radiator which are sequentially arranged from the front panel to the rear panel, and the fan is electrically connected with the capacitor plate.

Further, the heat dissipation layer is further provided with an inductor which is arranged at an interval in the direction from the front panel to the rear panel with the heat sink, and the inductor is electrically connected with the relay board.

Further, the shell is further provided with a frame and a cover plate, the frame and the cover plate form a cavity in a surrounding mode, the front panel and the rear panel are arranged in the cavity, and the fan is fixed to the frame through a fixing plate.

Furthermore, the front panel and the rear panel are provided with air vents within the coverage range corresponding to the heat dissipation layer.

Furthermore, the active power filter device for the photovoltaic power distribution network further comprises an operation screen and an LED lamp, wherein the operation screen and the LED lamp are arranged in a coverage range of the outer surface of the front panel corresponding to the working layer.

The utility model provides an active power filter for photovoltaic distribution network has following technological effect at least: compared with the prior art, the utility model provides an active filter device for photovoltaic distribution network, utilize the well plywood to divide into working layer and heat dissipation layer with the inner space in the casing, be equipped with the electric capacity board in proper order in the working layer from front panel to rear panel, IGBT board and relay board, be equipped with the top plate above the relay board, be equipped with the keysets of adjacent front panel on the top plate, the power and the operation board of neighbouring rear panel, set up power and operation board side by side, make the structure compacter between each component, electric connection between each component is more near in the space distance, the quantity of numerous and diverse circuit arrangement and sheet metal component has been reduced, the overall arrangement is rationalized more in space, the overall structure volume has been reduced, more be favorable to realizing the design of target electric bridge and arrange.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an active power filter device for a photovoltaic power distribution network according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the inside of a housing of the active filter device for the photovoltaic power distribution network shown in fig. 1;

fig. 3 is a schematic top view of the active filtering device for the photovoltaic power distribution network shown in fig. 2;

FIG. 4 is a schematic top view of the active power filter assembly shown in FIG. 2 with the top plate removed;

fig. 5 is a left side view schematically illustrating an active filtering device for the photovoltaic power distribution network shown in fig. 2.

In the figure:

100. active power filter device for photovoltaic power distribution network

110. Case 111, front panel 112, and rear panel

113. Frame 114, cover plate 115, handle ear protector

116. Air-permeable opening 117, operation screen 118 and LED lamp

120. Medium plate 122, working layer 124, heat radiation layer

130. Radiating assembly 132, fan 134 and radiator

136. Inductor 138, fixing plate 141, and capacitor plate

142. IGBT board 143, relay board 144, and safety board

145. Terminal block 146, port plate 147, N-phase terminal

148. Total N rows 149, single-phase N rows 150, upper plate

161. Adapter plate 162, power supply 163 and operation plate

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "fixed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Referring to fig. 1 to fig. 5, an active power filter device 100 for a photovoltaic power distribution network according to an embodiment of the present invention will now be described.

Referring to fig. 1 to 5, an embodiment of the present invention provides an active power filter device 100 for a photovoltaic power distribution network, including a casing 110, where the casing 110 has a front panel 111 and a rear panel 112 opposite to each other, a middle panel 120 is disposed in the casing 110 to divide the casing 110 into a working layer 122 and a heat dissipation layer 124 from top to bottom, the heat dissipation layer 124 is provided with a heat dissipation assembly 130, a capacitor plate 141, an IGBT plate 142, and a relay plate 143 disposed on the middle panel 120 are sequentially disposed from the front panel 111 to the rear panel 112 in the working layer 122, an upper panel 150 is disposed above the relay plate 143, and the upper panel 150 is provided with an adapter plate 161 adjacent to the front panel 111, a power supply 162 adjacent to the rear panel 112, and a calculation plate 163 parallel to the power supply 162; the power source 162 is electrically connected to the adapter plate 161, the adapter plate 161 is electrically connected to both the relay plate 143 and the operation plate 163, the relay plate 143 is electrically connected to the IGBT plate 142, the IGBT plate 142 is electrically connected to the capacitor plate 141, and the capacitor plate 141 is electrically connected to the heat sink 130.

It should be noted that the embodiment of the present invention provides an active power filter device 100 for a photovoltaic power distribution network, which is applied to a photovoltaic power distribution network, and can ensure reliable operation of the photovoltaic power distribution network, thereby improving the quality of electric energy of users. The embodiment of the utility model provides an active filter device 100 for photovoltaic distribution network can regard as the H bridge type integrated function photovoltaic device that zero sequence current compensation ability multiplies to use, can realize H bridge type circuit design through the position relation of each component of rational arrangement, realizes voltage layer control, can also realize other target electric bridge designs of course.

Specifically, the IGBT board refers to an IGBT driving board, the capacitor board 141, the IGBT board 142, and the relay board 143 may be fixed to the middle plate 120 by screws, and the adapter board 161, the power supply 162, and the operation board 163 may be fixed to the upper plate 150 by screws, so as to stabilize positions. The middle-layer board 120 and the upper-layer board 150 are used for rationalizing the layout of the inner space of the shell 110, the capacitor board 141, the IGBT board 142 and the relay board 143 are sequentially arranged, the adapter board 161, the power supply 162 and the operation board 163 are arranged on the upper-layer board 150, the power supply 162 and the adapter board 161 are arranged in a proximity mode, the adapter board 161 and the relay board 143 are arranged in a proximity mode, and therefore all components needing to be electrically connected are closer to each other in space, complex circuit arrangement is saved, and a target bridge is convenient to form.

The power source 162 and the operation panel 163 are arranged in parallel at one end close to the rear panel 112, which saves space and provides a beautiful arrangement. The adapter plate 161 is in the form of a strip and is transversely arranged in the housing 110, so that the adapter area is increased, and the wiring is simpler, tidier and more attractive. The power 162 can be electrically connected with the adapter plate 161 through the lead wire, and can take the supporting effect into account through the copper column connection, thereby facilitating the installation, saving the space and reducing the volume. The adaptor board 161 may be electrically connected to the relay board 143 by a plug, and may be electrically connected to the operation board 163 by a plug. Relay board 143 can be connected with IGBT board 142 through plug-in components, and IGBT board 142 can be connected with electric capacity board 141 electricity through the board clamp plate, and the function effect is unanimous, more conveniently makes, is convenient for install.

In addition, other designs or improvements of the electrical connection relationship between the components can be made based on the requirements for designing different target bridges, which is not limited.

It can be appreciated that the number of sheet metal parts is reduced by the auxiliary support of the middle and

upper plates

120, 150, so that the number of sheet metal parts of the whole module is reduced, and the cost is reduced. Meanwhile, the specifications of the screws and the corresponding screw holes are set to be the same, and the positions and specifications of the sheet metal part screws are unified, so that the sheet metal part screw is convenient to mount. The active filter device 100 for the photovoltaic power distribution network is characterized in that the active filter device 100 is in ampere and kilovolt as a unit, the large modules are unified in specification through small unit modularization, the basic parts of the modules are consistent, and good universality can be realized through modular plug-in connection, so that the purposes of attractive appearance and reliable and convenient installation are achieved, meanwhile, the production cost is reduced through reducing the number of sheet metal parts, the purpose of convenient installation is achieved, and further the production efficiency is improved.

The embodiment of the utility model provides an active power filter device 100 for photovoltaic distribution network has following technological effect at least: compared with the prior art, the embodiment of the utility model provides an active power filter device 100 for photovoltaic distribution network, utilize well plywood 120 to divide into working layer 122 and heat dissipation layer 124 with the inner space in casing 110, be equipped with electric capacity board 141 from front panel 111 to rear panel 112 in working layer 122 in proper order, IGBT board 142 and relay board 143, be equipped with upper plate 150 above relay board 143, be equipped with adapter plate 161 of adjacent front panel 111 on upper plate 150, power 162 and operation board 163 of adjacent rear panel 112, set up power 162 and operation board 163 side by side, make the structure compacter between each component, electric connection between each component is more close to in space distance, the quantity of numerous and diverse circuit arrangement and sheet metal component has been reduced, the overall structure volume has been reduced more rationalized on the space overall arrangement, more be favorable to realizing the design of target electric bridge and arrange.

Referring to fig. 3 and 4, as an embodiment, a safety plate 144 is further disposed between the relay board 143 and the rear panel 112 in the working layer 122, and the rear panel 112 is provided with a terminal strip 145 electrically connected to the safety plate 144. In this embodiment, the capacitor plate 141, the IGBT plate 142, the relay plate 143, and the safety plate 144 are sequentially disposed from the front panel 111 to the rear panel 112 in the working layer 122, so that the space utilization ratio is high, and the distribution is more reasonable. The safety plate 144 is arranged next to the rear panel 112, the rear panel 112 is provided with a terminal strip 145 electrically connected with the safety plate 144, the structure is more compact, complex circuit arrangement is reduced, and the terminal strip 145 can be specifically a five-digit terminal and terminals with other digits. Moreover, the safety plate 144 is a small plate, which can not only ensure the safety inside the casing 110, but also reduce the cost.

Further, a port plate 146 is disposed in the working layer 122 and is juxtaposed to the fuse plate 144, and the port plate 146 is electrically connected to the interposer 161. In this embodiment, the port board 146 is also referred to as a port board. The safety plate 144 is a small plate, the occupied space is small, the safety plate 144 and the port plate 146 are arranged side by side, the space utilization rate can be improved, and the port plate 146 is adjacent to the adapter plate 161 and can be electrically connected in a plug-in mode. The port plate 146 is fixedly attached to the middle plate 120 to achieve a reliable positional relationship.

Referring to fig. 2 to 4, as an embodiment, the back panel 112 is provided with an N-phase terminal 147 electrically connected to the IGBT board 142. In this embodiment, the N-phase terminal 147 is fixed to the rear panel 112 by a screw, and the N-phase terminal 147 penetrates through the rear panel 112 to be electrically connected to the IGBT board 142, and serves as an input/output port of the active filter device 100 for a photovoltaic power distribution network, so that one side of the top end of the IGBT board 142 is connected to one side of the capacitor board 141, and the other side thereof is connected to the N-phase terminal 147. The N-phase terminal 147 and the terminal block 145 are arranged side by side on the rear panel 112, and the structure is more compact.

Further, a plurality of IGBT boards 142 are provided, the N-phase terminal 147 is electrically connected to the total N-bank 148, the total N-bank 148 is electrically connected to the plurality of single-phase N-banks 149, and the plurality of single-phase N-banks 149 are electrically connected to the plurality of IGBT boards 142 correspondingly. In this embodiment, the N-phase terminal 147 is connected to the total N rows 148 through screws inside the housing 110, the total N rows 148 are connected in parallel to the plurality of single-phase N rows 149, and each single-phase N row 149 is correspondingly connected to each IGBT board 142 through screws. With such a configuration, a reasonable layout of the connection between the N-phase terminal 147 and the IGBT board 142 can be realized.

Referring to fig. 2 and 5, as an embodiment, the heat dissipation assembly 130 includes a fan 132 and a heat sink 134 sequentially disposed from the front panel 111 to the rear panel 112, and the fan 132 is electrically connected to the capacitor plate 141. In this embodiment, the fan 132 and the heat sink 134 are disposed in the heat dissipation layer 124, at least one set of the fan 132 and the heat sink 134 is disposed, and the fan 132 is aligned with the front panel 111 for heat dissipation. The fan 132 is vertically opposed to the capacitor plate 141 and may be electrically connected by a lead wire. The radiator 134 is opposite to the IGBT board 142 in the vertical direction, a through hole is formed in the middle layer board 120 at a position corresponding to the radiator 134, and the IGBT board 142 passes through the through hole and is connected with the radiator 134 through a screw, so that heat dissipation is facilitated.

Further, the heat dissipation layer 124 is provided with an inductor 136 spaced from the heat sink 134 in a direction from the front panel 111 to the rear panel 112, and the inductor 136 is electrically connected to the relay board 143. In this embodiment, the fan 132, the radiator 134 and the inductor 136 are sequentially arranged from the front panel 111 to the rear panel 112 in the heat dissipation layer 124, and a certain space can be formed due to the certain height of the fan 132 and the radiator 134, so that the inductor 136 is reasonably arranged in the space of the heat dissipation layer 124, the space of the inductor arranged in the working layer 122 is saved, and the overall structure is more compact. Meanwhile, the inductor 136 is aligned with the relay board 143 in the upper and lower spaces, the relay board 143 is fixedly connected to the middle plate 120, and the lead-out wires of the inductor 136 are electrically connected to the relay board 143 through the middle plate 120. On the basis of the above embodiment, the inductor 136 is cooperatively connected with other components to form a target bridge.

Further, referring to fig. 1 and 5, the housing 110 further has a frame 113 and a cover plate 114 enclosing a cavity with the front panel 111 and the rear panel 112, and the fan 132 is fixed to the frame 113 through a fixing plate 138. In this embodiment, the housing 110 includes a front panel 111, a rear panel 112, a frame 113, and a cover plate 114, which together form a cavity for accommodating the components, the front panel 111 is disposed at the front of the frame 113, the rear panel 112 is disposed at the rear of the frame 113, the cover plate 114 is disposed on the frame 113 to form the housing 110, and the front panel 111, the rear panel 112, and the cover plate 114 are all fixedly connected to the frame 113 through screws. The fan 132 is connected to the fixing plate 138 by screws, and the fixing plate 138 is fixed to the frame 113 by the screws, thereby achieving the mounting reliability of the fan 132. Of course, clamping, welding, etc. may also be used to secure the blower 132.

In order to ensure the air outlet effect, please refer to fig. 1, as an embodiment, the front panel 111 and the rear panel 112 are provided with an air inlet 116 within the coverage range corresponding to the heat dissipation layer 124. In this embodiment, the front panel 111 and the rear panel 112 are provided with the ventilation openings 116, so that cool air can be sucked in and hot air can be discharged in time. It is understood that the shape of the ventilation opening 116 can be modified from a conventional circular hole to a hexagonal hole, so that the air outlet area of the whole ventilation opening can be increased.

In order to facilitate installation of the whole structure, referring to fig. 1, as an embodiment, the active power filter device 100 for a photovoltaic power distribution network further includes handle protection lugs 115 disposed on two outer sides of the front panel 111. In this embodiment, the handle lugs 115 are mounted on both sides of the exterior of the front panel 111 by screws, and the handle lugs specifically include integrally formed handles and lugs, so that the number of sheet metal parts can be reduced, and the production cost can be reduced.

In order to facilitate manipulation of various parameters of the active filtering device 100 for the photovoltaic power distribution network, referring to fig. 1, as a specific embodiment, the active filtering device 100 for the photovoltaic power distribution network further includes an operation screen 117 and an LED lamp 118, and the operation screen 117 and the LED lamp 118 are both disposed in a coverage area of the outer surface of the front panel 111 corresponding to the working layer 122. Specifically, the operation screen 117 is disposed at the middle position of the outer surface of the front panel 111 corresponding to the working layer 122, the LED lamp 118 is disposed at the upper end of one side of the outer surface of the front panel 111 corresponding to the working layer 122, various parameters of the active power filter device 100 for the photovoltaic power distribution network can be monitored and changed through the operation screen 117, and the LED lamp 118 can be used for illuminating the use environment, facilitating the operation, and can also be used as an indicator lamp of the use state.

It can be understood that the embodiment of the present invention provides an active power filter device 100 for a photovoltaic power distribution network, which utilizes components such as a capacitor plate 141, an IGBT plate 142, a relay plate 143, a safety plate 144, a port plate 146, a switch plate 161, a power supply 162, an operation plate 163, an inductor 136, a terminal row 145, an N-phase terminal 147, a total N-row 148, and a single-phase N-row 149, and can be used as an H-bridge type integrated function photovoltaic device with multiplied zero-sequence current compensation capability through a position relationship and an electrical connection relationship between each component in a reasonable layout.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The active filter device for the photovoltaic power distribution network is characterized by comprising a shell, wherein the shell is provided with a front panel and a rear panel which are opposite, a middle-layer plate is arranged in the shell to divide the shell into a working layer and a heat dissipation layer from top to bottom, the heat dissipation layer is provided with a heat dissipation assembly, a capacitor plate, an IGBT (insulated gate bipolar translator) plate and a relay plate which are arranged on the middle-layer plate are sequentially arranged in the working layer from the front panel to the rear panel, an upper-layer plate is arranged above the relay plate, and a switching plate adjacent to the front panel, a power supply adjacent to the rear panel and an operation plate which is parallel to the power supply are arranged on the upper-layer plate;

2. The active filter device for a photovoltaic power distribution network according to claim 1, wherein a fuse board is further provided in the working layer between the relay board and the rear panel, and the rear panel is provided with a terminal block electrically connected to the fuse board.

3. The active filter device for a photovoltaic power distribution network according to claim 2, wherein a port plate is further provided in the working layer, the port plate being juxtaposed to the fuse plate, and the port plate being electrically connected to the interposer.

4. The active filter device for a photovoltaic power distribution network according to claim 1, wherein the rear panel is provided with an N-phase terminal electrically connected to the IGBT board.

5. The active filtering device for the photovoltaic power distribution network according to claim 4, wherein a plurality of IGBT boards are provided, the N-phase terminal is electrically connected with a total N rows, the total N rows are electrically connected with a plurality of single-phase N rows, and the plurality of single-phase N rows are electrically connected with a plurality of IGBT boards correspondingly.

6. The active filter device for the photovoltaic power distribution network according to claim 1, wherein the heat dissipation assembly comprises a fan and a heat sink which are sequentially arranged from the front panel to the rear panel, and the fan is electrically connected to the capacitor plate.

7. The active filter device for a photovoltaic power distribution network according to claim 6, wherein the heat dissipation layer is further provided with an inductor spaced from the heat sink in a direction from the front panel to the rear panel, and the inductor is electrically connected to the relay board.

8. The active filter device for a photovoltaic power distribution network according to claim 6, wherein the housing further has a frame and a cover plate enclosing a cavity with the front panel and the rear panel, and the fan is fixed to the frame by a fixing plate.

9. The active power filter device for the photovoltaic power distribution network according to claim 1, wherein the front panel and the rear panel are provided with air vents within the coverage range corresponding to the heat dissipation layer.

10. The active filtering device for the photovoltaic power distribution network according to claim 1, further comprising an operation screen and an LED lamp, wherein the operation screen and the LED lamp are both disposed in a coverage area of the outer surface of the front panel corresponding to the working layer.